Stored script injection via missing nonce validation
Published Mar 31, 2025 · Updated Apr 28, 2026
CSRF in Gagan Deep Singh PostmarkApp Email Integrator 2.4 and earlier allows remote attackers to inject stored scripts via forged requests. The settings-processing path accepts state-changing form and AJAX requests without nonce verification, allowing attacker-controlled settings values to be stored and later rendered as scripts. Exploitation requires an authenticated administrator to visit a crafted page or click a malicious link; the stored script then executes in the WordPress administrative context.
Summary
What happened
CSRF in Gagan Deep Singh PostmarkApp Email Integrator 2.4 and earlier allows remote attackers to inject stored scripts via forged requests. The settings-processing path accepts state-changing form and AJAX requests without nonce verification, allowing attacker-controlled settings values to be stored and later rendered as scripts. Exploitation requires an authenticated administrator to visit a crafted page or click a malicious link; the stored script then executes in the WordPress administrative context.
The record
- CVE
- CVE-2025-31617
- Published
- Mar 31, 2025
- Updated
- Apr 28, 2026
- Vendor
- Gagan Deep Singh
- Product
- PostmarkApp Email Integrator
- Classifications
- CWE-352, T1566.002
- Attack vector
- network
- Privileges
- unauthenticated
Timeline
How it unfolded
- Mar 31, 2025CVE publishedPublication date reported by the CVE source.
- Apr 28, 2026Record updatedLatest update available in the CVE record.
Exploitability
Present is not the same as exploitable
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Is a vulnerable build present?
Compare these published version ranges with your installed build and any vendor patches.
- Affected versionversion=0 <=2.4 changes=[{"at":"2.5.0","status":"unaffected"}]
What conditions does exploitation require?
What is affected?
Published CVSS scores
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Attacks
What attackers are doing with it
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Public exploit references
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Technologies
Your stack
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Your stack
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